Currently Bivol has yet to be knocked down. From the past i dont think Girard, Barber or Del Valle were down. Anyone else?
I think Henry Maske. He struggled in the first fight against Graciano Rocchigiani and was down in the 12th round. Nevertheless, it was more of a shove and no official knockdown.
I was going to say Spinks or Tarver but I remembered Qawi dropped Spinks in the 8th round and Tarver was dropped by Harding. Zsolt Ederi is a criminally underrated light heavy that was never dropped to my knowledge.
Okay, not that easy to find someone. Do you have a source for Henry Maske's knockdown against Andrea Magi? I can't find anything about it.
Well, okay, I can't find it and I wouldn't be sure about it. Maybe there will be the fight on youtube one day.